10 



A VENATIONAL STUDY OF THE ZYGOPTERA 



PROTOnEURIMAE 

 LESTOIDIMAE 



\ CoEMAGRIOrSINAL 



Lestimae \ ^^ I ■ / 



r\EGAP0DA6Ri0NIHAE 



PsEUD05TI6MATinAE 



EPALLAei/SAE 

 DiSPAROCYPHIHAE 



Agriomi/sae 



POLYTnORIfiAE 



Epiophlebinae 



AfilSOZYGOPTERA 



Fig. C. Proposed Phylogenetic Tree for the Zygoptera. 



The Polythorinae 



The most sharply differentiated group of the Agrionidae, in that 



it differs most from the others, Is the Polythorinae. In it M does 



not descend the arculus to any extent, so that the quadrangle is 



very much wider proximally than distally and is concave anteriorly. 



